Update app.py

app.py

@@ -41,7 +41,7 @@ if user_api_key is not None and user_api_key.strip() != "":
         template=template
     )
     llm_chain = LLMChain(
-        llm=HuggingFaceHub(huggingfacehub_api_token=huggingfacehub_api_token, repo_id="tiiuae/falcon-7b-instruct", model_kwargs={"temperature": 0.2}),
+        llm=HuggingFaceHub(huggingfacehub_api_token=user_api_key, repo_id="tiiuae/falcon-7b-instruct", model_kwargs={"temperature": 0.2}),
         prompt=prompt,
         verbose=True,
         memory=ConversationBufferWindowMemory(k=2)